Boiler-furnace.



A. c. MON 111..

BOILER FURNACE.

APPLICATION FILED SEPT. 8, I917.

Patented Aug. 20,1918.

3 SHEETSSHEET I.

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A. c. Mon, In. BOILER FURNACE.

APPLICATION FILED SEPT. I3; 19H.

1,276,395. Patented Aug. 20, 1918.

3 SHEETS-SHEET 2.

A. C. IVIOTT, JR.

BOILER FURNACE.

APPUCATION FILED SEPT.8. 1917.

1,276,395., 7 Patented Au 20, 1918.

3 SHEETS-SHEET 3.

m: mum's PETERS 5a,, FHDYu-Lrfnin. wAsmNamN, n. c. 3

nNrrED s'raras PATENT ent ce.

ABRAM o. MOTT, JR, on PHILADELPHIA, PENNSYLVANIA, ASSIGNOR .TO ABRAMUOXSTOVE COMPANY, OF PHILADELPHIA, PENNSYLVANIA, A CORPORATION OF PENN-SYLVANIA.

BOILER-FURNACE.

Application filed September 8, 1917. Serial No. 190,341.

proved boiler;

Fig. 2, is a longitudinal sectional view on the line 2-2, Fig. 3;

Fig. 3, is a sectional elevation on the line 3-3, Fig. 1;

Fig. 4, is a sectional plan view on the line 44, Fig. 3;

Fig. 5, is a detached'perspective view of the fire pot section of theboiler;

Fig. 6, is an inverted perspective new of the dome section;

Fig. 7, is a perspective view of a modification of the fire pot section;

Figs. 8 and 9, are sectional views illustrating an intermediate section;and

Fig. 10, is a plan view of an intermediate section.

Referring to the drawings, 1 isthe base of the boiler structure made ofcast iron and inclosing the ash pit 2. 3 is the grate made in sections,as shown, and having its bearings in the base section. This grate can beof any suitable type. 4 isthe fire pot section and 5 is the domesection. The fire pot section 1 is mounted on the base and the domesection is mountedupon and secured to the fire pot section. The fire potsection is made hollow, as shown, forming an annular water space 6,which is connected to the water space 7 in the dome 5 through theoverhead passages 8 in two projections at the upper end of said fire potsection and through neck 9 in the dome section.

The hollow projections are made integral with the fire pot section andextend over the fire, as shown in Fig. 2, and are con-' nected to thebase 10 of the dome section by nipples 11 in the manner common to thistype of boiler. The base portion of the dome is of the same diameter asthe top of the fire pot section and the dome is contracted to form theneck 9, leaving a channel 12 be tween the dome proper and the base 10and this is inclosed by an annular plate 13 and forms a flue whichconnects at the forward,

I attached one of the circulating pipes and in the lower portion of thefire pot section is an opening communicatingwith the water space towhich the other circulating pipe is attached.

17 is a fire door frame, which extends from a point below the fire dooropening 18 to the under side of the dome 5, and pivotally mounted onthis frame is the firedoor 20, which extends the full height, as shownin Fig. 1, so that when the door-is open it not only exposes the firechamber, but also the flue 12, which surrounds the neck 9, and in thedoor is the usual damper 19. By this construction, the channel or flue12 can be readily cleansed by simply opening the main fire door. In thebase is the usual ash pit door 22 and directly above the grate is theclean out door 21 of the ordinary type.

In Fig. 7, I have shown a single hollow projection 8 located at the backof the boiler, as it will be understood that in boilers of small size asingle passage may be sufficient.

Specification of Letters Patent. Patented Aug. 2(),' 191 8.

Thus it will be seen, by the above con- I In Figs. 8, 9 and 10, I haveshown an intermediate section 23 having, in the present instance, twoopenings in its bottom,

forming communication with the fire pot section 4 through nipples 11 andin the top of this intermediate section are two openings alinlng withthe openings in the dome section 5 and the two sections are connected bynipples 11 as shown. The sec tion is hollow and has a flue 24 thereinconnected at the rear with the combustion chamber of the fire potsection and at theforward end with the flue 12 in the dome section. Thisconstruction may be used when increased heatingsurface is desired.

I claim 1. The combination in a boiler, of a cast metal fire pot sectionhaving a water chamber therein; a cast metal dome section made hollowand forming a water chamber and having a contracted neck and an extendedbase arranged to fit on the upper end of the fire pot section; anopening at one side of the fire pot section communicating with the waterchamber of said section and an opening in the dome section at one sideof the center; and means for coupling the two sections together at theopenings so that the water will circulate through both sections, leavingthe bottom of the dome section exposed to the products of combustion.

2. The combination in a boiler, of a cast metal fire pot section havinga water chamber therein; a cast metal dome section made hollow andforming a water chamber and having a contracted neck and an extendedbase, the base being arranged to fit the fire pot section; two openingsin each section, one at each side of the center of the open ings in thefire pot section communicating with the water chamber therein and theopenings in the dome section communicating with the water chambertherein; nipples in the openings connecting the two sections; and aplate inclosing the space surrounding the neck of the dome section andcommunicating with the fire chamber, the base of the dome section beingdiscontinued at one side to form a flue passage.

3. The combination in a boiler, of a fire pot section made hollow andforming an an nular water space surrounding the fire chamber and havingtwo hollow portions projecting at the upper end toward each other andinto the combustion chamber, each projection having an opening with awater section mounted on the fire pot section and having openingsalining with the openings in the hollow projecting portions; nipplesconnecting the two sections; and a passage in the upper sectioncommunicating with the combustion chamber of the fire pot section toallow for the passage of the products of combustion to the chimney.

4E. The combination in a boiler, of a cast metal fire pot section and acast metal section mounted on the fire pot section, each section havinga water chamber therein; means for connecting the water chambers of thetwo sections, the upper section having a contracted neck; a platesurrounding the neck and forming a flue, the lower portion of the uppersection being reduced at the front to form a passage between the firechamber of the fire pot section and the fiue of the upper section; and afire door frame extending from the point above the flue of the uppersection to a point below the upper end of the fire pot section, formingan enmade hollow and having an enlarged main portion; a contracted neckand a base, said base fitting on the upper end of the fire pot sectionand having an opening therein alining with the projections in the firepot section, the base of the dome section being discontinued at thefront to form a passage between the fire pot section and the spacesurrounding the neck of the dome; a plate extending from the base of thedome and inclosing a flue space of the neck; and a flue boXcommunicating with the space so that the products of combustion willpass from the fire boX around the neck of the dome.

6. The combination of a base; a fire pot door opening formed at thefront of the fire pot section and between the two projections; a domesection having a reduced portion forming a neck and a base section ofthe same diameter as the upper portion of the fire pot section andhaving two openings therein arranged to aline with the openings in thefire pot section; nipples connecting the two sections at the openings,the base of the dome section being reduced at the front end in line withthe fire door opening of the base; a fire door frame inclosing the firedoor opening; and an annular plate sur rounding the dome section at theneck and forming a fiue communicating with the chimney.

In witness whereof I affiX my signature.

ABRAM c. MOTT, JR.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

